Attachment for carburetors



Nov. 23, 1943. J. A. BALOGH ATTACHMENT FOR CARBURETORS Filed May 5, 1941 2 Sheets-Sheet 1 '9 l JNVENTOR.

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ATTACHMENT FOR CARBURETORS vFiled May 5, 194 2 Sheets-Sheet 2 INVENTOR. Jam/,4. @fu @6V/ff,

Patented Nov. 23, 1943 UNITED STATES PATENT OFFICE ATTACHMENT FOR CARBURETORS John A. Balogh, Chicago, Ill.

Application May 5, 1941, Serial No. 391,993

1 Claim.

`This invention relates to an attachment for a carburetor and more particularly to a device adapted for use in connection with a carburetor of the down-draft type and constituting means for mixing crank case vapors and fumes from a volatile oil with incoming air.

One object of the invention is to provide a carburetor attachment of such construction that it may be easily applied to the air inlet pipe of a carburetor and rmly but detachably secured thereto, the device being so constructed that as air passes through the same it will be filtered and have crank case fumes and chemical fumes mixed with it and delivered to the carburetor free from dust and other foreign matter.

Another object of the invention is to provide a device wherein a chemical consisting of a volatile oil is delivered through a tube into a sponge or equivalent absorbent material packed in the casing of the device and from which chemical fumes are emitted to mix with air as it flows through the cleaner.

Another object of the invention is to provide the device with an improved arrangement of conduits for conducting the fumes from the casing or housing into a throat or tube extending centrally through the casing and having its lower end protruding from the casing and adapted to be connected with the air inlet of a carburetor.

Another object of the invention is to provide a device of this character wherein provision is made for conducting hot fumes from the crank case of an engine through the casing by way oiV a tube which is formed into a coil for heating vol.-

atile oil carried by the absorbent material and f' has its inner end portion extending into the throat through which air passes to the carburetor.

Another object of the invention is to provide an improved arrangement of valves for controlling flow of chemically treated air and crank case fumes from the conduits into the throat, the valves being yieldably held closed to serve as anti-backre check valves and adapted to be opened by suction set up through the throat toward the carburetor.

Another object of the invention is to permit adjustment of a spring which yieldably holds the valves closed from a point externally of the casing.

In the accompanying drawings:

Fig. 1 is a sectional view taken vertically through the improved device.

Fig. 2 is a sectional view taken transversely through the upper portion of the device on the line 2--2 of Fig. 1.

Fig. 3 is a sectional view taken transversely through the device intermediate its height, on the line 3-3 of Fig. 1.

Fig. 4 is a transverse sectional view on a reduced scale, taken through the lower portion of the device on the line 4--4 of Fig. 1.

The casing I of this improved carburetor attachment is formed of a strong sheet metal or other suitable material and has a bottom 2 formed with a center opening surrounded by a depending ilange 3 which ts closely about and is brazed or otherwise iirmly secured to a tubular throat 4 extending axially through the casing. The upper end of the throat fits snugly about a ilange or neck 5 surrounding an opening formed at the center of the head or cap 6 which closes the upper end of the casing. The tubular throat serves as a mounting member for connecting the device with the inlet neck 'I of a down-draft carburetor and in order that it may be connected with the neck l, the lower portion of the throat protrudes from the bottom a suiiicient distance to allow it to be conveniently fitted about the neck. Slits 8 are formed in the lower end portion of the throat so that when the clamp 9 is tightened, the throat will be contracted about the neck and firmly but detachably held in engagement therewith.

The casing I is packed with sponge or an equivalent absorbent material I0 which is to be saturated with a chemical. The chemical which is a volatile oil is delivered to the sponge through a tube II, and from an inspection of Fig. 1, it will be seen that the tube extends at an incline and has its upper portion bent to pass through the wall of the casing. The outer portion of the tube is of increased diameter and forms a funnel I2 into which the volatile oil or equivalent chemical is poured, and in order to normally close the upper end of the funnel, there has been provided a cap I3 which is hinged to the funnel, as shown at I4, so that it may be swung from a lowered position, in which it constitutes an air tight closure for the funnel, to a raised or open position. A

, screen I5, which is mounted within the casing,

rests upon a ledge I6 over the sponge and serves to hold the sponge rmly in place within the casing.

Fumes from the chemical with which the sponge is saturated, are to be delivered into the throat 4 to mix with air passing through the throat and, in order to do so, there has been provided a tube or pipe II which extends axially through the throat and has its upper portion extending upwardly therefrom and provided with branch pipes i8 eXtending radially therefrom and curved downwardly with their outer ends united to the cap or head 6 and registering with openings I9 formed through the head in spaced relation to each other circumferentially thereof. By this arrangement, fumes given off by the chemical in the sponge will pass upwardly in the casing and through the branch pipes to the upper end of the pipe Il, through which it iiows downwardly and out from the lower end thereof into the lower portion of the throat to mix with air iiowing through the throat. This is indicated by arrows in Fig. 1. A fiat head or wall 23 closes the upper end of the pipe Vi and carries a threaded neck 2| about which ts a hood 22.

This hood rests on the head or wall 2t, where it is secured by a nut 23 screwed upon the neck, and since the hood is of appreciably greater diameter than the casing and has its marginal portions curved downwardly and disposed about the upper portion of the casing in spaced :relation thereto, air may flow upwardly between` the casing and the hood and across the head S into the upper end of the throat.

Fumes from the crank case are also to be de livered into the throat and, in order to do so, there has been provided a tube or pipe 2li which passes through the side wall of the casing near the lower end thereof and has its inner portion 25 curved to t about the throat in spaced relation thereto. The tube is then bent to form a neck 25 which passes through the wall of the throat radially thereof and, at the center of the throat, is bent downwardly to form a short tip Z?. The portion of thetube within the casing constitutes a heater which serves to heat the chemical and assist vaporization thereof. Therefore, the oil will be quickly vaporized and pass oiic upwardly through the sponge and into the upper portion of the casing from which it ows through the tubes i3 and into the upper end of the pipe il. in order to prevent back-ring through the pipe il and the tube or pipe 2li, there have been provided a compound valve including a rod or stem 28 which passes longitudinally through the pipe Il with its lower portion projecting therefrom and through the tip 217 of the tube 2d. A valve disk 29 is ixed to the lower end of the valve stem 28 in position to close vthe lower end of the neck when the rod or stem is shifted upwardly, and adjacent the lower end ofthe pipe il, the rod is threaded, as shown at Sil, toreceive nuts 3i by means of which a larger valve disc 32 is adjustably secured Von the rod i or stem. Since the valve disc 32 mounted on the stem, it may be shifted along the stem to a position in which it will have closing-'engagement with the lower end of the pipe Il' when the valve disk 29 moves into closing engagement with the neck 2l. Therefore, the inner end of the tube'Z and the lower end of the pipe or tube il will be closed at the same time and serve as a check valve to present damage by back-firing through the tube and pipe. The valve disks are to be moved downwardly to open position by suction through theV carburetor neck and the throat il and, in order to yieldably Yhold the compound valve closed, there has been'provided a spring 33 coiled about the portion of the is adjustably rod which passes through the pocket 34 formed in the neck 2| and projects upwardly therefrom.

A washer 35 constituting an abutment for the upper end of the spring 33, ts about the upper end of the rod and is engaged by lock nuts 36 by means of which tension of the spring is controlled. A dust cap 31 serves as a shield for the spring and the nuts 36 and since this shield is held in place by a nut 38 screwed upon the neck 2 i, the shield or dust cap may be removed when adjustment of the spring is necessary.

When this device is in use, it is applied to the air inlet neck of Va carburetor and when the engine is started, suction will be created through the throat i and air drawn inwardly through space between the hood 22 and the upper end of the casing I and downwardly through the throat. As the-air moves downwardly through the throat, the valve disks 29 and 32 will be drawn downwardly to open position and suction created through pipe Il and tube 2d, and chemical fumes given off from the high vapor penetrating oil will be drawn from the sponge IE! through the pipe il and its arms IE5 and crank case fumes drawn through the tube 2. These fumes mix with the air owing through the throat into the iniet neck of the carburetor and mix with gasoline fumes taken up as the air passes through the carburetor to form a good combustible mixture. In case there is back-firing, the spring closes the two valves 29 and 32 by upward pull upon the valve rod or stem and damage by backring through the pipe I'i of the tube 25 will be prevented.

Having thus described the invention, what is claimed is:

A carburetor comprising a casing having peripheral walls and a top and bottom, the top being formed with a center opening, a tubular throat extending vertically through the casing centrally thereof with its upper end registering with the opening in the top and'its lower portion projecting through the bottom and adapted for connection with the air inlet of a carburetor, absorbent material in the casing about the throat, means for delivering volatile liquid to the absorbent material, aV pipe extending vertically in the throat and protruding upwardly therefrom with its upper end closed and provided with tubular side arms extending laterally and downwardly therefrom and communicating with the casing through the top thereof, a threaded neck extending upwardly from the upper end of said pipe and formed with a socket open at its top, a hood for said casing fitting about said neck and resting on the upper end of the pipe and having side wall portions surrounding the upper end of the casing in spaced relation to walls of the casing, a valve for the lower end of said pipe having a stem extending vertically through the pipe and socket of the neck, an adjustable abutment on, the valve stem above said neck, a spring in the socket about the stem engaging said abutment and urging the stem upwardly to closev the valve,I and a dust cap having a nut in its lower Vend screwed on the neck and having binding en,

gagement with the last mentioned nut.

Y JOHN A. BALoGH. 

